Medical Branch Alphabet – A
| S. No | Acronyms | Full Form | Short Explanation | Practical Example |
|---|---|---|---|---|
| A001 | AA | Alopecia Areata | Autoimmune hair-loss disorder | Dermatologist diagnosing patchy scalp hair loss |
| A002 | AAA | Abdominal Aortic Aneurysm | Bulging of abdominal aorta | Screening elderly patients for rupture risk |
| A003 | AAB | Anti-A Antibody | Antibody against A blood group | Crossmatching before transfusion |
| A004 | AAC | Acute Angle-Closure (Glaucoma) | Sudden rise in eye pressure | Emergency eye pressure reduction |
| A005 | AAD | Antibiotic-Associated Diarrhea | Diarrhea caused by antibiotics | Patient develops loose stools post-antibiotics |
| A006 | AAF | Atrial Atrial Flutter | Rapid heartbeat rhythm | ECG showing flutter waves |
| A007 | AAG | Acute Atrophic Gastritis | Inflammation causing stomach lining thinning | Endoscopy diagnosis |
| A008 | AAH | Atypical Adenomatous Hyperplasia | Precancerous lung lesion | Pathology finding in lung biopsy |
| A009 | AAI | Asynchronous Atrial Inhibition | Pacemaker mode | Cardiac pacing setting |
| A010 | AAL | Acute Allergic Laryngitis | Sudden throat swelling | Patient with hoarseness after allergen exposure |
| A011 | AAM | Assisted Ambulation Method | Walking with support | Physiotherapy training |
| A012 | AAN | American Academy of Neurology | Neurology professional body | Guidelines for stroke treatment |
| A013 | AAO | American Academy of Ophthalmology | Eye health organization | Research on cataract guidelines |
| A014 | AAP | Acute Abdomen Pain | Sudden severe abdominal pain | ER triage for acute appendicitis |
| A015 | AAR | Adverse Action Report | Report of harmful drug reaction | Hospital documentation |
| A016 | AAS | Acute Aortic Syndrome | Life-threatening aortic disease | CT scan for dissection |
| A017 | AAT | Alpha-1 Antitrypsin | Protein preventing lung damage | Testing for genetic deficiency |
| A018 | AAV | Adeno-Associated Virus | Viral vector for gene therapy | Delivering therapeutic genes |
| A019 | AAW | Active Assisted Workout | Assisted physical therapy | Stroke patient rehab |
| A020 | AAX | Amino Acid X | Placeholder amino acid | Genetic sequence notation |
| A021 | AB | Antibody | Immune protein | Blood tests checking for infection |
| A022 | ABA | Applied Behavior Analysis | Behavioral therapy for autism | Autism treatment sessions |
| A023 | ABC | Airway, Breathing, Circulation | Emergency first aid steps | CPR training |
| A024 | ABD | Abdomen | Abdominal area abbreviation | Chart notes documenting pain location |
| A025 | ABE | Acute Bacterial Endocarditis | Heart valve infection | IV antibiotics administered |
| A026 | ABG | Arterial Blood Gas | Measures oxygen & CO₂ | ICU patient monitoring |
| A027 | ABH | Anti-Blood Group H | Rare antibody type | Transfusion screening |
| A028 | ABI | Ankle-Brachial Index | Measures arterial perfusion | Peripheral artery disease test |
| A029 | ABN | Advance Beneficiary Notice | Medicare paperwork | Patient receiving coverage warning |
| A030 | ABO | Blood Grouping System | Blood type classification | Transfusion matching |
| A031 | ABP | Arterial Blood Pressure | Blood pressure in arteries | Monitoring hypertension |
| A032 | ABR | Auditory Brainstem Response | Hearing test for nerves | Newborn hearing screening |
| A033 | ABS | Acute Bacterial Sinusitis | Sinus infection | Antibiotic treatment |
| A034 | ABT | Antibiotic Therapy | Treatment using antibiotics | Prescribing amoxicillin |
| A035 | ABV | Anti-Bacterial Vaccine | Vaccine against bacteria | Pneumococcal immunization |
| A036 | AC | Acromioclavicular | Shoulder joint region | Sports injury diagnosis |
| A037 | ACA | Anterior Cerebral Artery | Brain blood supply vessel | Stroke localization |
| A038 | ACC | Adenoid Cystic Carcinoma | Rare cancer affecting glands | Head & neck tumor biopsy |
| A039 | ACD | Anemia of Chronic Disease | Low hemoglobin due to chronic illness | Lab results evaluation |
| A040 | ACE | Angiotensin-Converting Enzyme | Blood pressure regulatory enzyme | ACE inhibitor drugs |
| A041 | ACG | Antral Congestion Gastritis | Stomach inflammation | Endoscopy result |
| A042 | ACH | Acetylcholine | Neurotransmitter | Muscle contraction physiology |
| A043 | ACJ | Acromioclavicular Joint | Shoulder joint | X-ray after fall injury |
| A044 | ACKD | Acquired Cystic Kidney Disease | Kidney cysts due to dialysis | Ultrasound screening |
| A045 | ACL | Anterior Cruciate Ligament | Knee ligament | Sports injury tear |
| A046 | ACOG | American College of Obstetricians & Gynecologists | OB/GYN authority | Pregnancy health guidelines |
| A047 | ACP | Advance Care Planning | Discussing future medical decisions | End-of-life discussion |
| A048 | ACR | Albumin/Creatinine Ratio | Kidney function test | Diabetic nephropathy monitoring |
| A049 | ACT | Activated Clotting Time | Blood coagulation test | Heparin monitoring |
| A050 | ACU | Acute Care Unit | Hospital department | Post-surgery recovery |
| S. No | Acronyms | Full Form | Short Explanation | Practical Example |
|---|---|---|---|---|
| A051 | ACV | Apple Cider Vinegar (medical nutrition) | Used for alternative therapy | Dietician recommendation |
| A052 | ACW | Anti-Clockwise Rotation | Clinical measurement | Orthopedic joint assessment |
| A053 | ADA | American Diabetes Association | Diabetes guidelines | Treatment standards |
| A054 | ADC | Apparent Diffusion Coefficient | MRI measure | Stroke imaging |
| A055 | ADH | Anti-Diuretic Hormone | Water retention hormone | SIADH diagnosis |
| A056 | ADL | Activities of Daily Living | Basic daily tasks | OT functional evaluation |
| A057 | ADM | Admission | Patient entry to hospital | ER documentation |
| A058 | ADN | Associate Degree in Nursing | Nursing qualification | RN training |
| A059 | ADO | Adolescent | Ages 10–19 classification | Pediatric notes |
| A060 | ADP | Adenosine Diphosphate | Energy molecule | ATP cycle function |
| A061 | ADR | Adverse Drug Reaction | Harmful reaction to drugs | Reporting to pharmacovigilance |
| A062 | ADS | Acute Decompensated Shock | Sudden circulatory failure | ICU emergency care |
| A063 | ADT | Androgen Deprivation Therapy | Treatment for prostate cancer | Hormone inhibition |
| A064 | ADV | Adenovirus | Virus causing infections | Upper respiratory testing |
| A065 | AE | Adverse Event | Undesirable outcome | Clinical trial reporting |
| A066 | AEB | As Evidenced By | Clinical charting term | SOAP note |
| A067 | AED | Automated External Defibrillator | Shock device for cardiac arrest | Public emergency use |
| A068 | AEF | Arteriovenous Fistula | Abnormal artery-vein connection | Dialysis access |
| A069 | AEM | Acute Encephalomyelitis | Brain inflammation | MRI confirmation |
| A070 | AEP | Auditory Evoked Potential | Brain hearing response | Neurodiagnostic test |
| A071 | AES | Acute Encephalitis Syndrome | Brain infection | Hospital isolation |
| A072 | AF | Atrial Fibrillation | Irregular heartbeat | ECG showing AF |
| A073 | AFI | Amniotic Fluid Index | Measurement of amniotic fluid | Pregnancy ultrasound |
| A074 | AFL | Atrial Flutter | Heart rhythm disorder | Cardioversion procedure |
| A075 | AFM | Acute Flaccid Myelitis | Polio-like illness | MRI spine evaluation |
| A076 | AFP | Alpha-Fetoprotein | Tumor marker | Liver cancer screening |
| A077 | AFR | Acute Febrile Response | Fever due to infection | Triage assessment |
| A078 | AFS | Autoimmune Fibrosis Syndrome | Fibrotic autoimmune disease | Diagnostic biopsy |
| A079 | AFT | After | Post-procedure time | Charting |
| A080 | AGA | Appropriate for Gestational Age | Newborn size classification | NICU records |
| A081 | AGC | Atypical Glandular Cells | Abnormal Pap smear | Gynecologic evaluation |
| A082 | AGI | Acute Gastrointestinal Illness | GI infection | ER case |
| A083 | AGN | Acute Glomerulonephritis | Kidney inflammation | Urine tests |
| A084 | AGO | Androgenic Ovarian Disorder | Hormonal imbalance | Endocrinology referral |
| A085 | AGP | Aerosol-Generating Procedure | High-risk medical procedure | Intubation PPE |
| A086 | AGR | Albumin-to-Globulin Ratio | Blood protein ratio | Liver function assessment |
| A087 | AGS | Acute Geriatric Syndrome | Sudden decline in elderly | Fall-related disorder |
| A088 | AGT | Angiotensinogen | Hormone precursor | Hypertension physiology |
| A089 | AH | Anterior Hypothalamus | Brain thermoregulation center | Heat stress study |
| A090 | AHA | American Heart Association | Cardiac guidelines | CPR protocols |
| A091 | AHB | Acute Hepatitis B | Liver infection | HBsAg test |
| A092 | AHC | Acute Hemorrhagic Conjunctivitis | Eye viral infection | Community outbreak |
| A093 | AHD | Adult Heart Disease | General heart conditions | Cardiac clinic visit |
| A094 | AHF | Acute Heart Failure | Sudden heart pumping failure | Diuretics in ER |
| A095 | AHI | Apnea-Hypopnea Index | Sleep apnea severity | Sleep lab diagnosis |
| A096 | AHN | Acute Hemorrhagic Nephritis | Kidney bleeding disorder | Urinalysis |
| A097 | AHP | Acute Hepatic Porphyria | Rare metabolic disease | Genetic testing |
| A098 | AHT | Abusive Head Trauma | Child injury | Forensic evaluation |
| A099 | AI | Artificial Insemination / Autoimmunity | Depends on context | Fertility clinic / lab tests |
| A100 | AIC | Ankle Injury Classification | Ortho grading | ER fracture assessment |
| S. No | Acronyms | Full Form | Short Explanation | Practical Example |
|---|---|---|---|---|
| A101 | AID | Autoimmune Disease | Immune system attacks body | Diagnosing lupus |
| A102 | AIGA | Acute Infective Gastroenteritis | Stomach infection | ORS therapy |
| A103 | AIM | Acute Infectious Meningitis | Meninges inflammation | Lumbar puncture |
| A104 | AIN | Acute Interstitial Nephritis | Kidney inflammation | Drug-induced reaction |
| A105 | AIP | Acute Intermittent Porphyria | Rare metabolic disorder | Urine porphyrins |
| A106 | AIR | Acute Inflammatory Response | Body’s reaction to injury | Redness, swelling |
| A107 | AIS | Androgen Insensitivity Syndrome | Genetic condition | Clinical endocrine exam |
| A108 | AIV | Avian Influenza Virus | Bird flu virus | Pandemic preparedness |
| A109 | AJ | Ankle Jerk | Neurologic reflex | Testing reflexes |
| A110 | AKA | Above Knee Amputation | Surgical limb removal | Rehabilitation training |
| A111 | AKI | Acute Kidney Injury | Sudden kidney failure | Elevated creatinine |
| A112 | AKT | Protein Kinase B | Cell pathway enzyme | Cancer research |
| A113 | AL | Acute Leukemia | Blood cancer | Chemotherapy |
| A114 | ALA | Aminolevulinic Acid | Compound used in phototherapy | Skin cancer treatment |
| A115 | ALD | Alcoholic Liver Disease | Liver damage from alcohol | Lab liver enzymes |
| A116 | ALF | Acute Liver Failure | Sudden liver dysfunction | ICU treatment |
| A117 | ALG | Allergy | Hypersensitivity reaction | Skin tests |
| A118 | ALH | Atypical Lobular Hyperplasia | Breast pathology | Mammogram follow-up |
| A119 | ALI | Acute Lung Injury | Severe lung damage | Mechanical ventilation |
| A120 | ALK | Anaplastic Lymphoma Kinase | Cancer gene | Targeted therapies |
| A121 | ALL | Acute Lymphoblastic Leukemia | Blood cancer in children | Bone marrow biopsy |
| A122 | ALP | Alkaline Phosphatase | Enzyme indicator | Liver/bone tests |
| A123 | ALS | Amyotrophic Lateral Sclerosis | Nerve degenerative disease | Mobility decline |
| A124 | ALT | Alanine Aminotransferase | Liver enzyme | Liver function test |
| A125 | ALTE | Apparent Life-Threatening Event | Sudden infant episode | NICU evaluation |
| A126 | AMA | Against Medical Advice | Patient leaves hospital early | Documentation |
| A127 | AMC | Arthrogryposis Multiplex Congenita | Congenital deformities | Pediatric ortho |
| A128 | AMI | Acute Myocardial Infarction | Heart attack | ECG & troponin |
| A129 | AML | Acute Myeloid Leukemia | Blood cancer | Chemotherapy induction |
| A130 | AMN | Acute Motor Neuropathy | Nerve damage | EMG testing |
| A131 | AMP | Adenosine Monophosphate | Energy molecule | Biochemistry labs |
| A132 | AMR | Antimicrobial Resistance | Resistance to antibiotics | WHO surveillance |
| A133 | AMS | Altered Mental Status | Change in consciousness | ER evaluation |
| A134 | ANA | Antinuclear Antibody | Autoimmune test | Lupus screening |
| A135 | ANG | Angiography | Artery imaging | Cardiac catheterization |
| A136 | ANK | Ankle Measurement | Ortho exam | Injury documentation |
| A137 | ANP | Atrial Natriuretic Peptide | Hormone for fluid balance | Heart failure marker |
| A138 | ANS | Autonomic Nervous System | Controls involuntary functions | Heart rate regulation |
| A139 | ANT | Anti-Coagulant Therapy | Blood thinning treatment | Warfarin monitoring |
| A140 | ANV | Acute Nausea and Vomiting | Sudden nausea | ER treatment |
| A141 | AOA | American Osteopathic Association | U.S. medical body | Residency accreditation |
| A142 | AOM | Acute Otitis Media | Middle ear infection | Ear pain in children |
| A143 | AOR | Area of Responsibility | Care region | Nursing assignment |
| A144 | AOS | Adult-Onset Still’s Disease | Rare inflammatory disease | Fever & rash |
| A145 | AP | Anteroposterior | Front-to-back view | X-ray angle |
| A146 | APA | American Psychological Association | Psychology organization | Research standards |
| A147 | APC | Adenomatous Polyposis Coli | Colon cancer gene | Genetic testing |
| A148 | APD | Acute Psychiatric Disorder | Mental health crisis | Admission for stabilization |
| A149 | APF | Acidic Phosphatase Femoral | Bone enzyme | Osteoporosis study |
| A150 | APH | Antepartum Hemorrhage | Bleeding before childbirth | Emergency OB care |
A151–A200
| S. No | Acronyms | Full Form | Short Explanation | Practical Example |
|---|---|---|---|---|
| A151 | API | Active Pharmaceutical Ingredient | Main drug compound | Drug manufacturing |
| A152 | APL | Acute Promyelocytic Leukemia | Leukemia subtype | ATRA therapy |
| A153 | APM | Arthroscopic Partial Meniscectomy | Knee surgery | Ortho procedure |
| A154 | APN | Acute Pyelonephritis | Kidney infection | IV antibiotics |
| A155 | APO | Apolipoprotein | Cholesterol component | Lipid panel |
| A156 | APP | Amyloid Precursor Protein | Alzheimer’s-related protein | Research studies |
| A157 | APR | Annual Percentage Rate (medical billing) | Cost measure | Hospital finance |
| A158 | APRA | Acute Proliferative Retinopathy | Retinal disease | Ophthalmology exam |
| A159 | APS | Antiphospholipid Syndrome | Autoimmune clotting disorder | Recurrent miscarriages |
| A160 | APT | Activated Partial Thromboplastin Time | Clotting test | Heparin monitoring |
| A161 | APX | Apraxia | Motor planning disorder | Stroke rehab |
| A162 | AQ | Aqueous Humor | Eye fluid | Glaucoma physiology |
| A163 | AQL | Acceptable Quality Level | Quality control | Pharma testing |
| A164 | AR | Aortic Regurgitation | Leaking aortic valve | Echocardiography |
| A165 | ARC | AIDS-Related Complex | Early HIV symptoms | HIV management |
| A166 | ARDS | Acute Respiratory Distress Syndrome | Severe lung condition | ICU ventilation |
| A167 | ARE | Age-Related Eye Disease | Ophthalmic conditions | Cataract evaluation |
| A168 | ARF | Acute Renal Failure | Sudden kidney shutdown | Dialysis initiation |
| A169 | ARG | Arginine | Amino acid | Nutrition therapy |
| A170 | ARI | Acute Respiratory Infection | Viral or bacterial infection | Flu-like symptoms |
| A171 | ARMD | Age-Related Macular Degeneration | Vision loss disease | Retina exam |
| A172 | ARP | Action Recovery Plan | Clinical improvement plan | Post-surgery rehab |
| A173 | ARS | Acute Radiation Syndrome | Radiation poisoning | Nuclear exposure case |
| A174 | ART | Antiretroviral Therapy | HIV treatment | Daily medication |
| A175 | ARU | Acute Rehabilitation Unit | Recovery department | Stroke patient rehab |
| A176 | AS | Ankylosing Spondylitis | Spine arthritis | Rheumatology care |
| A177 | ASA | Acetylsalicylic Acid (Aspirin) | Pain/fever reducer | Prescribing aspirin |
| A178 | ASAT | Aspartate Aminotransferase Test | Liver enzyme test | Liver disease screening |
| A179 | ASC | Atypical Squamous Cells | Abnormal Pap smear result | Cervical cancer screening |
| A180 | ASD | Atrial Septal Defect | Heart hole | Pediatric cardiology |
| A181 | ASH | Acute Severe Hemorrhage | Severe bleeding | Emergency transfusion |
| A182 | ASL | Arterial Spin Labeling | MRI brain perfusion | Stroke imaging |
| A183 | ASM | Antiseizure Medication | Epilepsy treatment | Prescribing valproate |
| A184 | ASN | Associate in Nursing | Nursing qualification | Academic program |
| A185 | ASP | Aspiration | Inhalation of fluid/food | Pneumonia risk |
| A186 | AST | Aspartate Aminotransferase | Liver enzyme | Liver function test |
| A187 | ASU | Antiseptic Unit | Hospital disinfection area | Sterile processing |
| A188 | AT | Acetyltransferase | Enzyme class | Biochemical studies |
| A189 | ATD | Attention to Detail | Clinical documentation | Nursing chart audits |
| A190 | ATF | Anterior Talofibular Ligament | Ankle ligament | Sprain injury |
| A191 | ATLS | Advanced Trauma Life Support | Emergency trauma course | ER physician training |
| A192 | ATM | Ataxia Telangiectasia Mutated | DNA repair gene | Genetic disease |
| A193 | ATP | Adenosine Triphosphate | Energy molecule | Metabolism labs |
| A194 | ATR | Acute Tubular Renal Necrosis | Kidney damage | Urine output monitoring |
| A195 | ATS | American Thoracic Society | Lung disease authority | Asthma guidelines |
| A196 | ATT | Anti-Tuberculosis Therapy | TB treatment | DOTS program |
| A197 | ATV | Atrioventricular | Heart conduction region | ECG interpretation |
| A198 | AU | Auris (Ear) | Ear medical notation | ENT prescription |
| A199 | AUE | Acute Urethral Edema | Swelling of urethra | Urology visit |
| A200 | AUR | Acute Urinary Retention | Sudden inability to urinate | Catheter insertion |



